____ Is Used in Tips Having from One to Six

Q15: Most nonferrous metals-such as brass, copper, and

Q16: Keep the inner cones of the flame

Q17: Sunglasses or other dark shaded glasses are

Q18: Most cutting tips are made of _

Q19: If _ is used in a deeply

Q20: The kindling temperature of iron results in

Q21: _ slag is very porous, brittle, and

Q22: _ is when the metal bends or

Q23: A good oxyacetylene cut should not only

Q24: The diameter, or size of the center